Dry salt is to be produced at a rate of 2 kg/h by evaporating water from a feed containing 20% nacl. the brine (27% nacl) leaving the evaporator may either be recycled to the evaporator or may be discarded. if the brine produced is 25% of the weight of dry salt, calculate: (a) the feed rate if the brine is recycled (b) the percent excess of the feed rate if the brine is discarded over that required when the brine is recycled.

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

Which best describes how johannes kepler developed his laws of planetary motion

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?